Title :
Capacity of full frame DCT image watermarks
Author :
Barni, Mauro ; Bartolini, Franco ; Rosa, Alessia De ; Piva, Alessandro
Author_Institution :
Dept. of Inf. Eng., Siena Univ., Italy
fDate :
8/1/2000 12:00:00 AM
Abstract :
The evaluation of the number of bits that can be hidden within an image through digital watermarking is a crucial topic, which has been addressed only for additive watermarks. The evaluation of watermark capacity is very important because it allows to put a theoretical upper bound on the amount of information that can be hidden into an image by a given watermarking procedure, regardless of the watermark extraction technique. It is the purpose of this work to suggest a methodology for the evaluation of the watermark capacity in a nonadditive, non-Gaussian framework, and to discuss the results we obtained by applying it to a set of standard images
Keywords :
channel capacity; copy protection; copyright; discrete cosine transforms; image coding; additive watermarks; copyright protection; digital watermarking; full frame DCT image watermarks; nonadditive non-Gaussian framework; standard images; watermark capacity; AWGN; Channel capacity; Copyright protection; Data mining; Discrete cosine transforms; Gaussian noise; Pixel; Signal processing; Upper bound; Watermarking;
Journal_Title :
Image Processing, IEEE Transactions on
